Means for securing knife-blades to a knife-bar.



H. BERGLUND` MEANS FOR SECURING KNIFE BLADES T0 A KNIFE BAR. APPLICATIONFILEDAPR. 2|. |916.

1,21 8,5 1 1. Patented Mar. 6, l1917.

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narran sraras Partnr @Wim-Q HERMAN BERGLUND, 0F MAHTOWA,`I-IINESTA,ASS-IG-.NOR7 OF-ONEjHALF T0 LAWRENCE COMPAGNIE, OF DULUIH,`MINNESOTA.

MEANS FOR SECURING KNIFE-BLADES TO .A KNIFE-BAR.

Application filed April 21, 1916.

To all whom/t may concern.'

Be it known that I,.HERMAN BERGLUND, a citizenof the United States,residing at Mahtowa, in the county of. Carlton and State of Minnesota,have invented new and useful Improvements in Meansvfor'SecuringKnife-'Blades to a Knife-Bar, of which the following is a specication. l

This invention relates to means for securing knife blades to a knifebar, and it consists in the novel features hereinafter described andclaimed.

An object of the present invention isto provide an efficient means forholding the knife bladesupon a knife bar in theeuttmg apparatus of amowing or like machine, and the present invention is designed to be usedto advantage as a substitute for the rivets which are now commonly usedifor accomplishing the same purpose:

Incident to the use of rivetsvseveral disadvantages exist, among thembeing that when it is desired to remove one ormore knife blades fromthebar it is necessary to cut the rivets and punchA them out of the knifeblades and bar. This operation frequently expands the bar andconsequently v 'the bar has to be dressed orreshaped when new knifeblades are placedfthereon. By the use of the present invention there 1sno possibility of expanding the bar or distort-1 ing its shape byremoving the knifeblades therefrom, and furthermore, the blades may beeasily and quickly removed for substitution or sharpening.

With the above objects in view the present invention consists inproviding upon the knife bar fixed studs adapted to pass transverselythrough the knife'blades.v Some of the said studs are longer thanothers, and the longer studs are threaded at their upper ends andproject above a strip which is positioned at the upper sides of theknife blades. Nuts are screw threaded upon the threads of the extendedstuds. The knife bar is provided at its rear edge with an upstandingflange with which is hingedly connected a bar adapted to swing. over thesaid strip, the said bar being provided withrecesses which snuglyreceive the said nuts and prevent the same from turning after they havebeen set in position above the strip. The said bar, when closed downupon the strip, extends rearwardly kbeyond the Specification of LettersPatent.

Patented Mar. 6, 1917.

Serial No. 92,689. Y

flange and is adapted to lie over the forward Fig. 2 is a transversesectional view of the same cut on line 2 2 of F ig. l. j

Fig. 3 is a fragmentary plan view of the saine with parts in section.

Fig. 4 is a similar front view with parts 1n section.

Fig. 5 is a transverse sectional view cut on the line 5 5 of Fig. 3. Y

As illustrated in the accompanying drawing, the knife bar l is providedat its rear edge with anpupstanding flange 2 disposed at right angle tothe body portion of the bar. Studs 3 passtransversely through theforward portion of the bar l and are `lixed with relation to the same.Some of the studs 3 are longer than others, and the longer studs arethreaded at their upper ends as at 4. The knifeblades are of the usualconfiguration and are provided in the vicinity of their rear edges withopenings which receive the studs 3.

A metallic strip 6 lies upon the upper surfaces of the rear portions ofthe blades 4 and is provided with openings which: receive the upperportions of the studs 3. rEhe upper ends of those studs which are notthreaded are flush with the upper surface of the strip 6, while theupper lends of the threaded studs project above the upper surface of thestrip 6. Nuts 7 are screwed upon the threaded ends 4 of the saidprojecting studs and the lower faces of the nuts bear in close contactagainst the upper surface of thev Y with recesses 9 which snugly receivethe nuts 7 and hold the said nuts against turning movement upon thestuds on which they are mounted. The flange 2 of the knife bar l islocated ink advance of the forward edge of the finger bar l0 of thecutting apparatus and when the forward portion of the bar 8 is swungdown in'close contact with the upper surface of the strip 6, the rearportion of the said bar 8 lies over the forward edge -portion of thecutterV bar 10 and in close contact with the saine as shown in Fig. 2 ofthe drawing.

ln operation the bar 10 remains stationary while the bar l isreciprocated back and forth in 4front of the same in the usual manner.

W hen it is desired to remove one or more of the blades 5 forsubstitution, sharpening or other purposes, the knife bar l is detachedfrom the machine and then the bar 8 may be swung freely from over thestrip G. By using a wrench the nuts 7 may be unscrewed from the threadedends of the studs Lland thus the knife blade 5 and the strip G areliberated. After lifting the strip 6 from over the upper ends of thestuds 3, any particulail knife 5 may be removed by liftingit off thesaid stud. Then another knife may be substituted in its stead or in casethe removed knifeis repaired or sharpened it may be replaced. Duringthis 'operation it will be seen that no strain whatever is applied torthe knife bar l, consequently the said bar is not distorted andwlien'the )arts are assembled upon the machinethey fit accurately andmay he operated without undue friction.

From the above description taken in conjunction with the accompanyingdrawing it will be seen that simple and ellicient means is provided forholding the knife blades in position upona knife bar and that the devicemay be easily and quickly manipulated for the purpose of removing one ormore of the knife bars and replacing others or the Copies of this patentmay be obtained for said extended portion and a bar hingedly:

connected with the flange at the upperrear edge thereof and havingrecesses which receive the said nuts. y

2. ln a cutting apparatus a knife bar having at its rear edge anupstanding flange, studs mounted upon the knife bar, knife blades havingopenings which receive the studs, a strip lying transversely across theknife blades and having openings whichy receive the studs, some of thesaid studs having threaded portions which extend above the upper surfaceof the strip, nuts Vmounted on said extended portion and abar hingedlyconnected with the flange at theupper rear edge thereof and havingrecesses adapted to receive the nut-s the last 4mentioned bar alsohaving arportion disposed behind the rear surface of the langeandadapted to lie l above the finger bar ofthe cutting apparatus.

in testimony whereof I affix my signature in presence of two witnesses.

HERMAN nnneLUND.

Witnesses five cents each, by addressing the Commissioner of Patents,Washington, D. C. i Y

